Database Administrator

CHAR to NUMBER:Use the TO_NUMBER function to convert characters to numbers, for example:V_total: = TO_NUMBER ('192. 0') + sal;-15-16BytesNUMBER to CHAR:The TO_CHAR function can be used to convert numbers to characters, for example:V_comm: = TO_CHAR (

I believe everyone has some knowledge about Oracle full-text indexing. The following describes how to create an oracle full-text index. If you are interested in oracle full-text indexing, take a look. Step 1 Check and set database rolesFirst, check

When I run./runinstaller After configuring all the content, my error is reported.Error message: Exception in thread "main" java. lang. UnsatisfiedLinkError:/Tmp/OraInstall2007-12-03_09-02-02AM/jre/1.4.2/lib/i386/libawt. so:LibXp. so.6: cannot open

Oracle function (converts the entire string to lowercase) NLS_LOWER (x [, y]) [Function] returns a string and converts it to lowercase; [Parameter] x struct expression [Parameter] Nls_param (optional) specifies the sort method (nls_sort = ).

The relink method is used to ensure the normal use of the Oracle software after the operating system is upgraded, after the operating system is patched, after the Oracle patch is installed, and when problems occur during the relink process.This

Step 1: Install mysql-python-1.2.2.tarPython setup. py build Python setup. py intstall Step 2: Possible Errors 1. libmysqlclient. so.16: cannot open shared object file: No such file or directory Need to install a new package

Oracle table statements Create table student (sid int, sname varchar (20), sno int) 1. Stored Procedure without return values Create or replace procedure proc_student (para1 Integer, para2 varchar2, para3 Integer)Is BEGINInsert into student (sid,

The error message "unable to extand table..." appears when you perform insert and other operations ......" The table space is insufficient. Add a file for the tablespace under winserver (not described in this article ). This document describes how

A test was conducted. SQL> create table test1 (cola varchar2 (10); the table has been created. SQL> create table test2 (colb varchar2 (10); the table has been created. SQL> select * from test1; SQL> select * from test2; SQL> create or replace

Recently, when dba B updated Oracle ERP10.7 TEST DB, an error occurred while changing the apps step, resulting in the inability to log on to ERP10.7 Form. The troubleshooting section in the change ERP10.7 apps schema password method still cannot

-- Create a tablespace Create tablespace qebcp datafile 'C: \ Oracle \ QebCP \ qebcp. ora' Size 100 m reuse default storage (initial 500 k next 500 k pctincrease 20 ); -- Create a table user Create user qebcp identified by buzhidao default

Every time you start and shut down Oracle, you have to think about a bunch of commands. Especially in the learning or testing environment, it is hard to get bored when you knock too much, so you have written a servcie script, use the RedHat service

First, declare that, in general, you need to have the root permission in MySQL to modify the mysql password and grant permissions.User: bkjia user database: bkjia.com 1. Create a user.// Log on to MYSQL@> Mysql-u root-p@> Password// Create a

To use this function, mysql version must be 5.0.37 or later. Otherwise, you can only use the explain method to check. The profiling function provides more detailed information such as cpu io. The show profile format is as follows: Show profile [type[

In Oracle 11g, in addition to following the RMAN retention policy, you can also use RMAN to configure the deletion policy for archiving logs, that is, when archiving logs can be deleted. The archive log deletion policy applies to all archiving

The remote_listener cannot be enabled due to a problem in the settings. The alert Log is as follows: Starting up:Oracle Database 11g Enterprise Edition Release 11.2.0.2.0-64bit ProductionWith the Partitioning, Real Application Clusters, OLAP, Data

In the process of product iterative development and release, due to the increase in business requirements, the database will inevitably have structure adjustment and other operations.During the release of each version, how does one control the

UNDO tablespace description In the previous article (RMAN backup and recovery for the loss of offline data files), we talked about how to deal with the loss of offline data files. This article describes how to solve the loss of UNDO tablespace. The

1 show all; displays the current configuration information 2 select * from v $ rman_configuration; query non-default values in RMAN 3 common configure options 3.1 persistence Policy Configure retention policy to recovery window of 7 days; backups

I. Environment Description 1. Working logic diagram 2. Advantages and Disadvantages of MySQL-MMM Advantages: high availability, good scalability, automatic failover in case of faults. For master-master synchronization, only one database write